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of_irq_get() may return a negative error number as well as 0 on failure,
while the driver only checks for 0, blithely continuing with the call to
irq_set_chained_handler_and_data() -- that function expects *unsigned int*
so should probably do nothing when a large IRQ number resulting from a
conversion of a negative error number is passed to it. The driver then
probes successfully while being only partly functional...
Check for 'irq <= 0' instead and propagate the negative error number to the
probe method -- that will allow the deferred probing as well.
Fixes: d3c68e0a7e34 ("PCI: faraday: Add Faraday Technology FTPCI100 PCI Host Bridge driver")
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
b9f27afbc0